heat up
IdiomsExample Sentences
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As the rock collides with air molecules, both its surface and the surrounding gas heat up and begin to glow.
From Science Daily ● Oct. 29, 2026
Scientists warn that the intensity and frequency of extreme weather events will increase as the planet continues to heat up because of fossil fuel emissions.
From Barron's ● Sep. 27, 2026
As these tiny particles enter Earth's atmosphere at high speed, they heat up and produce the streaks of light we see as meteors.
From BBC ● Sep. 12, 2026
Another major test for the market this fall: The IPO calendar is expected to heat up, with at least one blockbuster offering, from Anthropic, and other high-profile names expected to list, as well.
From MarketWatch ● Sep. 10, 2026
He shivered slighdy.The day would soon heat up, but for now the desert air was chill with night.
From "The House of the Scorpion" by Nancy Farmer
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
